import java.util.Scanner;

public class Main1808 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int[] arr=new int[n];
        for (int i=0;i<arr.length;i++){
            arr[i]=sc.nextInt();
        }
        int a=0;
        int b=0;
        for (int i=0;i<arr.length;i++){
            if (arr[i]==10){
                a++;
            }else b++;
        }if (a>b){
            System.out.println("10");
        }else System.out.println("20");
    }
}
